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English definition of “foam”

foam

noun [U] (BUBBLES)    /fəʊm/ US  /foʊm/
a mass of very small bubbles formed on the surface of a liquidMasses and large amounts of things a substance like cream that is filled with bubbles of air: shaving foamMasses and large amounts of things
(Definition of foam noun (BUBBLES) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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